Strontium (Sr)

grundstof med atomnummer 38

Atomnummer	38
Atommasse	87.62
mass number	88

Gruppe	2
Periode	5
Blok	s

proton	38 p⁺
neutron	50 n⁰
elektron	38 e^-

Animated Bohrs atommodel of Sr (Strontium)

Fysisk Egenskab

Atomradius	200 pm 279 pm
molar volume	33,7 cm³/mol
Kovalent Radius	185 pm 157 pm 139 pm 195 pm 195 pm
Metallic Radius	191 pm 215 pm
Ionisk radius	118 pm 121 pm 126 pm 131 pm 136 pm 144 pm
Crystal Radius	132 pm 135 pm 140 pm 145 pm 150 pm 158 pm
Van der Waals-radius	255 pm 249 pm 300 pm 249 pm 364,1 pm
massefylde	2,64 g/cm³ 2.375 kg/m³

Kemisk Egenskab

energi

proton affinity
electron affinity	0,048 eV/particle
ioniseringsenergi	5,6948672 eV/particle 11,030276 eV/particle 42,88353 eV/particle 56,28 eV/particle 71 eV/particle 88 eV/particle 104 eV/particle 121,21 eV/particle 158,3 eV/particle 177 eV/particle 324,07 eV/particle 362 eV/particle 408 eV/particle 454 eV/particle 499 eV/particle 562 eV/particle 612 eV/particle 665 eV/particle 722 eV/particle 774 eV/particle 932 eV/particle 982,1 eV/particle 1.038 eV/particle 1.105 eV/particle 1.165 eV/particle 1.211 eV/particle 1.333,4 eV/particle 1.387,19 eV/particle 3.344,7 eV/particle 3.497 eV/particle 3.664 eV/particle 3.830 eV/particle 4.053 eV/particle 4.232 eV/particle 4.465 eV/particle 4.612,397 eV/particle 19.345,587 eV/particle 20.025,23 eV/particle

Fordampningsvarme	144 kJ/mol
smeltevarme	9,2 kJ/mol
standard enthalpy of formation	164 kJ/mol
elektron

Elektronskal	2, 8, 18, 8, 2

Valenselektron	2 ⓘ

electron configuration	[Kr] 5s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²

Oxidationstrin	1, 2
Elektronegativitet	5,695 eV/particle 0.1185082 0.95
Electrophilicity Index	0,730062406922635 eV/particle
fundamental state of matter

stoffase	Fast stof
gaseous state of matter
Kogepunkt	1.650,15 K
Smeltepunkt	1.050,15 K
critical pressure
critical temperature
trippelpunkt
appearance
farve	Silver #ff1493 #00ff00 #00ff00
appearance
Brydningsindeks
materialeegenskab
Varmeledningsevne
Termisk ekspansion	0,0000225 1/K
molar heat capacity	26,79 J/(mol K)
Varmefylde	0,306 J/(g⋅K)
Adiabateksponenten
electrical properties
type	Conductor
specifik ledningsevne	7,7 MS/m
Elektrisk resistivitet	0,00000013 Ω*m
superledning
Magnetisme
type	paramagnetic
magnetic susceptibility (Mass)	0,00000000132 m³/Kg
magnetic susceptibility (Molar)	0,000000000116 m³/mol
magnetic susceptibility (Volume)	0,00000347
magnetic ordering
Curietemperaturen
Néel temperature
struktur
Krystalstruktur	Fladecentreret Kubisk (FCC)
lattice constant	6,08 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hårdhed	1,5 MPa
Kompressibilitetsmodul
Forskydningsmodul	6,1 GPa
E-modul
Poissons forhold	0,28
speed of sound
klassificering
Kategori	Jordalkalimetaller, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	15
Mendeleev Number	8
Pettifor Number	15
Geochemical Class	alkaline earth metal
Goldschmidt classification	litophile

øvrige

Gas Basicity
polarizability	197,2 ± 0,2 a₀
C6 Dispersion Coefficient	3.175 a₀ 3.230 a₀
allotrope
Neutron cross section	1,2
Neutron Mass Absorption	0,0005
quantum number	1S0
rumgruppe	225 (Fm_3m)

Isotopes of Strontium

Stable Isotopes	3
Unstable Isotopes	32
Natural Isotopes	4

⁷³Sr

mass number	73
neutron number	35
Relative Atomic Mass	72,9657 ± 0,00043 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	25,3 ± 1,4 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1993
Paritet	-

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	63%

⁷⁴Sr

mass number	74
neutron number	36
Relative Atomic Mass	73,95617 ± 0,000107 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	27,6 ± 2,6 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1995
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

⁷⁵Sr

mass number	75
neutron number	37
Relative Atomic Mass	74,949952767 ± 0,000236183 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	85,2 ± 2,3 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1991
Paritet	-

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	5.2%

⁷⁶Sr

mass number	76
neutron number	38
Relative Atomic Mass	75,94176276 ± 0,000037 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	7,89 ± 0,07 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1990
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	3.4%

⁷⁷Sr

mass number	77
neutron number	39
Relative Atomic Mass	76,937945454 ± 0,0000085 Da
g-factor	-0,1392 ± 0,0016
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	9 ± 0,2 s
spin	5/2
nuclear quadrupole moment	1,27 ± 0,05
opdagelsesdato	1976
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.08%

⁷⁸Sr

mass number	78
neutron number	40
Relative Atomic Mass	77,932179979 ± 0,000008 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	156,1 ± 2,7 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1982
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁷⁹Sr

mass number	79
neutron number	41
Relative Atomic Mass	78,929704692 ± 0,000007967 Da
g-factor	-0,316 ± 0,0026666666666667
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,25 ± 0,1 m
spin	3/2
nuclear quadrupole moment	0,661 ± 0,006
opdagelsesdato	1972
Paritet	-

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁰Sr

mass number	80
neutron number	42
Relative Atomic Mass	79,924517538 ± 0,000003718 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	106,3 ± 1,5 m
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1961
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸¹Sr

mass number	81
neutron number	43
Relative Atomic Mass	80,923211393 ± 0,000003358 Da
g-factor	1,086 ± 0,008
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	22,3 ± 0,4 m
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1952
Paritet	-

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸²Sr

mass number	82
neutron number	44
Relative Atomic Mass	81,918399845 ± 0,000006432 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	25,35 ± 0,03 d
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1952
Paritet	+

decay mode	Intensitet
ϵ (electron capture)	100%

⁸³Sr

mass number	83
neutron number	45
Relative Atomic Mass	82,917554372 ± 0,000007336 Da
g-factor	-0,237 ± 0,0002
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	32,41 ± 0,03 h
spin	7/2
nuclear quadrupole moment	0,708 ± 0,011
opdagelsesdato	1952
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁴Sr

mass number	84
neutron number	46
Relative Atomic Mass	83,913419118 ± 0,000001334 Da
g-factor	0
natural abundance	0,56 ± 0,02
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1936
Paritet	+

decay mode	Intensitet
2β⁺ (double β⁺ decay)

⁸⁵Sr

mass number	85
neutron number	47
Relative Atomic Mass	84,912932041 ± 0,00000302 Da
g-factor	-0,22224444444444 ± 0,00015555555555556
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	64,846 ± 0,006 d
spin	9/2
nuclear quadrupole moment	0,263 ± 0,014
opdagelsesdato	1940
Paritet	+

decay mode	Intensitet
ϵ (electron capture)	100%

⁸⁶Sr

mass number	86
neutron number	48
Relative Atomic Mass	85,90926072473 ± 0,00000000563 Da
g-factor	0
natural abundance	9,86 ± 0,2
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1931
Paritet	+

⁸⁷Sr

mass number	87
neutron number	49
Relative Atomic Mass	86,90887749454 ± 0,0000000055 Da
g-factor	-0,24292444444444 ± 0,000024444444444444
natural abundance	7 ± 0,2
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	9/2
nuclear quadrupole moment	0,305 ± 0,002
opdagelsesdato	1931
Paritet	+

⁸⁸Sr

mass number	88
neutron number	50
Relative Atomic Mass	87,905612253 ± 0,000000006 Da
g-factor	0
natural abundance	82,58 ± 0,35
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1923
Paritet	+

⁸⁹Sr

mass number	89
neutron number	51
Relative Atomic Mass	88,907450808 ± 0,000000098 Da
g-factor	-0,4592 ± 0,0008
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	50,563 ± 0,025 d
spin	5/2
nuclear quadrupole moment	-0,253 ± 0,008
opdagelsesdato	1937
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹⁰Sr

mass number	90
neutron number	52
Relative Atomic Mass	89,90772787 ± 0,000001555 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	28,91 ± 0,03 y
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹¹Sr

mass number	91
neutron number	53
Relative Atomic Mass	90,910195942 ± 0,000005853 Da
g-factor	-0,354 ± 0,0008
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	9,65 ± 0,06 h
spin	5/2
nuclear quadrupole moment	0,042 ± 0,01
opdagelsesdato	1943
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹²Sr

mass number	92
neutron number	54
Relative Atomic Mass	91,911038222 ± 0,000003675 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,611 ± 0,017 h
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1956
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹³Sr

mass number	93
neutron number	55
Relative Atomic Mass	92,914024314 ± 0,000008109 Da
g-factor	-0,3172 ± 0,0008
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	7,43 ± 0,03 m
spin	5/2
nuclear quadrupole moment	0,24 ± 0,01
opdagelsesdato	1959
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹⁴Sr

mass number	94
neutron number	56
Relative Atomic Mass	93,915355641 ± 0,000001785 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	75,3 ± 0,2 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1959
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹⁵Sr

mass number	95
neutron number	57
Relative Atomic Mass	94,919358282 ± 0,000006237 Da
g-factor	-1,074 ± 0,004
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	23,9 ± 0,14 s
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1961
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁹⁶Sr

mass number	96
neutron number	58
Relative Atomic Mass	95,921719045 ± 0,000009089 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,059 ± 0,008 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1971
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁹⁷Sr

mass number	97
neutron number	59
Relative Atomic Mass	96,926375621 ± 0,000003633 Da
g-factor	-0,996 ± 0,004
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	432 ± 4 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1978
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.02%

⁹⁸Sr

mass number	98
neutron number	60
Relative Atomic Mass	97,928692636 ± 0,000003463 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	653 ± 2 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1971
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.23%

⁹⁹Sr

mass number	99
neutron number	61
Relative Atomic Mass	98,932883604 ± 0,000005085 Da
g-factor	-0,174 ± 0,0033333333333333
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	269,2 ± 1 ms
spin	3/2
nuclear quadrupole moment	0,76 ± 0,04
opdagelsesdato	1975
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.1%

¹⁰⁰Sr

mass number	100
neutron number	62
Relative Atomic Mass	99,93578327 ± 0,000007426 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	202,1 ± 1,7 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1978
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.11%

¹⁰¹Sr

mass number	101
neutron number	63
Relative Atomic Mass	100,940606264 ± 0,000009103 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	113,7 ± 1,7 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1983
Paritet	-

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.75%

¹⁰²Sr

mass number	102
neutron number	64
Relative Atomic Mass	101,944004679 ± 0,000072 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	69 ± 6 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1986
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	5.5%

¹⁰³Sr

mass number	103
neutron number	65
Relative Atomic Mass	102,949243 ± 0,000215 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	53 ± 10 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁰⁴Sr

mass number	104
neutron number	66
Relative Atomic Mass	103,953022 ± 0,000322 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	50,6 ± 4,2 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁰⁵Sr

mass number	105
neutron number	67
Relative Atomic Mass	104,959001 ± 0,000537 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	39 ± 5 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁰⁶Sr

mass number	106
neutron number	68
Relative Atomic Mass	105,963177 ± 0,000644 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	21 ± 8 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹⁰⁷Sr

mass number	107
neutron number	69
Relative Atomic Mass	106,969672 ± 0,000751 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

historie

opdager eller opfinder	A. Crawford
fundsted	Scotland
opdagelsesdato	1790
etymologi	From the Scottish town, Strontian.
udtale	STRON-she-em (engelsk)

source

Forekomst
Abundance in Earth's crust	370 mg/kg
natural abundance (verdenshave)	7,9 mg/L
natural abundance (menneskelige krop)	0,00046 %
natural abundance (Meteoroid)	0,00087 %
natural abundance (Solen)	0,000005 %
Abundance in Universe	0,000004 %

Nuclear Screening Constants

1	s	0.8089
2	p	3.9696
2	s	10.0982
3	d	15.2738
3	p	15.8324
3	s	15.3362
4	p	26.068
4	s	24.5556
5	s	31.9295

Strontium on ChemicalAid

AUT NKC	ph543045
Art & Architecture Thesaurus ID	300379545
Australian Educational Vocabulary ID	scot/3578
BNCF	40655
BNE-identifikator	XX528414
BNF	12169122m
Brockhaus Enzyklopädie online ID	strontium
CAB ID	18811
CAS-nummer	7440-24-6
CPV Supplementary	AA34
ChEBI-ID	33324
ChemSpider ID	4514263
Common Procurement Vocabulary	14772000
DSSTOX compound identifier	DTXCID50875720
DSSTox substance ID	DTXSID3024312
Den Store Danske-ID	strontium
ECHA Substance Infocard ID	100.028.303
Enciclopedia Treccani	stronzio
Encyclopædia Britannica Online-ID	science/strontium
Encyclopædia Universalis-ID	strontium
Freebase-ID	/m/025sf8p
GND-identifikator	4183762-9
Golden ID	Strontium-VWJ5P
HMDB-ID	HMDB0003642
HSDB-ID	2545
ICSC ID	1534
InChI	InChI=1S/Sr
InChIKey	CIOAGBVUUVVLOB-UHFFFAOYSA-N
KBpedia ID	Strontium
KEGG-ID	C13884
Krugosvet article	biologiya/stronciy
LCAuth	sh85129178
MeSH ID	D013324
NALT ID	6424
NDL-nummer	00571781
NE.se ID	strontium
Namuwiki ID	스트론튬
National Library of Israel J9U ID	987007541334305171
OmegaWiki-betydningsdefinition	3646
OpenAlex ID	C518915863
PSH-ID	5753
PubChem CID	5359327
Quora emne-ID	Strontium
RxNorm ID	10122
Römpp online ID	RD-19-04457
Store katalanske encyklopædi-ID	0106810
Store norske leksikon-ID	strontium
Store russiske encyklopædi Online-ID	4169533
Treccani's Enciclopedia Italiana ID	stronzio
UNII	YZS2RPE8LE
USGS Thesaurus ID	1581
WordNet 3.1 Synset ID	14679910-n
YSO ID	3096
ZVG-nummer	8310

Strontium (Sr)

Fysisk Egenskab

Kemisk Egenskab

øvrige

Isotopes of Strontium

73Sr

74Sr

75Sr

76Sr

77Sr

78Sr

79Sr

80Sr

81Sr

82Sr

83Sr

84Sr

85Sr

86Sr

87Sr

88Sr

89Sr

90Sr

91Sr

92Sr

93Sr

94Sr

95Sr

96Sr

97Sr

98Sr

99Sr

100Sr

101Sr

102Sr

103Sr

104Sr

105Sr

106Sr

107Sr

historie

source

Nuclear Screening Constants

⁷³Sr

⁷⁴Sr

⁷⁵Sr

⁷⁶Sr

⁷⁷Sr

⁷⁸Sr

⁷⁹Sr

⁸⁰Sr

⁸¹Sr

⁸²Sr

⁸³Sr

⁸⁴Sr

⁸⁵Sr

⁸⁶Sr

⁸⁷Sr

⁸⁸Sr

⁸⁹Sr

⁹⁰Sr

⁹¹Sr

⁹²Sr

⁹³Sr

⁹⁴Sr

⁹⁵Sr

⁹⁶Sr

⁹⁷Sr

⁹⁸Sr

⁹⁹Sr

¹⁰⁰Sr

¹⁰¹Sr

¹⁰²Sr

¹⁰³Sr

¹⁰⁴Sr

¹⁰⁵Sr

¹⁰⁶Sr

¹⁰⁷Sr